Heartstone Tweet Light Play, English, limit 50 $0.50 / $0.65 credit Buy This Product Details Color: Artifact Card Text: Creatures' activated abilities cost 1 less to play. If this would make an ability cost 0 or less mana to play, it costs 1, plus any nonmana costs. Rarity: U Cost: 3 Card Type: Artifact Name: Heartstone Finish: Regular Set Name: Stronghold